a couple of debug output statements to help diagnose a crash

[ardour.git] / libs / canvas / fill.cc

diff --git a/libs/canvas/fill.cc b/libs/canvas/fill.cc
index 4e2d2b19128558764cdc454337cd7f6e4bbaf795..bf72c678aabad34dad5ad232d1af642dc1103eac 100644 (file)
--- a/libs/canvas/fill.cc
+++ b/libs/canvas/fill.cc
@@ -1,45 +1,122 @@
+/*
+    Copyright (C) 2011-2013 Paul Davis
+    Author: Carl Hetherington <cth@carlh.net>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include <cairomm/cairomm.h>
+
 #include "ardour/utils.h"
 
-#include "pbd/xml++.h"
 #include "pbd/compose.h"
 #include "pbd/convert.h"
 
 #include "canvas/fill.h"
+#include "canvas/item.h"
+#include "canvas/types.h"
 #include "canvas/utils.h"
+#include "canvas/colors.h"
 
 using namespace std;
 using namespace ArdourCanvas;
 
-Fill::Fill (Group* parent)
-       : Item (parent)
+Fill::Fill (Item& self)
+       : _self (self)
        , _fill_color (0x000000ff)
        , _fill (true)
+       , _transparent (false)
 {
-
 }
 
 void
 Fill::set_fill_color (Color color)
 {
-       begin_change ();
-       
-       _fill_color = color;
+       if (_fill_color != color) {
+               _self.begin_visual_change ();
+               _fill_color = color;
 
-       end_change ();
+               double r, g, b, a;
+               color_to_rgba (color, r, g, b, a);
+               if (a == 0.0) {
+                       _transparent = true;
+               } else {
+                       _transparent = false;
+               }
+
+               _self.end_visual_change ();
+       }
 }
 
 void
 Fill::set_fill (bool fill)
 {
-       begin_change ();
+       if (_fill != fill) {
+               _self.begin_visual_change ();
+               _fill = fill;
+               _self.end_visual_change ();
+       }
+}
+
+void
+Fill::setup_fill_context (Cairo::RefPtr<Cairo::Context> context) const
+{
+        if (_pattern) {
+                context->set_source (_pattern);
+        } else {
+                set_source_rgba (context, _fill_color);
+        }
+}
+
+void
+Fill::setup_gradient_context (Cairo::RefPtr<Cairo::Context> context, Rect const & self, Duple const & draw_origin) const
+{
+       Cairo::RefPtr<Cairo::LinearGradient> _gradient;
+       
+       if (_vertical_gradient) {
+               _gradient = Cairo::LinearGradient::create (draw_origin.x, self.y0, draw_origin.x, self.y1);
+       } else {
+               _gradient = Cairo::LinearGradient::create (self.x0, draw_origin.y, self.x1, draw_origin.y);
+       }
+       
+       for (StopList::const_iterator s = _stops.begin(); s != _stops.end(); ++s) {
+               double r, g, b, a;
+               color_to_rgba (s->second, r, g, b, a);
+               _gradient->add_color_stop_rgba (s->first, r, g, b, a);
+       }
        
-       _fill = fill;
+       context->set_source (_gradient);
+}
 
-       end_change ();
+void
+Fill::set_pattern (Cairo::RefPtr<Cairo::Pattern> p)
+{
+        _pattern = p;
 }
 
 void
-Fill::setup_fill_context (Cairo::RefPtr<Cairo::Context> context) const
+Fill::set_gradient (StopList const & stops, bool vertical)
 {
-       set_source_rgba (context, _fill_color);
+       _self.begin_visual_change ();
+
+       if (stops.empty()) {
+               _stops.clear ();
+       } else {
+               _stops = stops;
+               _vertical_gradient = vertical;
+       }
+
+       _self.end_visual_change ();
 }